Investigations into the mechanism and treatment of chronic headache.
D000639:Amitriptyline / Q000627:therapeutic use*; D002986:Clinical Trials as Topic; D006261:Headache / Q000188:drug therapy*; D006801:Humans; D006897:Hydroxyindoleacetic Acid / Q000378:metabolism; D006973:Hypertension / Q000188:drug therapy*; D008784:Methysergide / Q000627:therapeutic use*; D008881:Migraine Disorders / Q000209:etiology*; D012701:Serotonin / Q000378:metabolism
D000639:Amitriptyline; D012701:Serotonin; D006897:Hydroxyindoleacetic Acid; D008784:Methysergide